During his school days, Kotone was talented enough to win the national swimming championships, and he was transferred to his alma mater as a teacher and became the advisor for the swimming club. It was once a prestigious school for swimming, but times have changed and the swimming club has weakened and is facing a crisis of survival. Kotone is entrusted with turning the club around, but his passion for teaching goes to waste and a big gap forms between him and the students... Gradually the gap widens and turns into hatred, and the students plot something...